Keysight-Agilent E3458A

The processor probe controls the target microcontroller through the Motorola background debug mode (BDM) port. The BDM technology allows you to control processor operation even if there is no software monitor on your target system. This feature is particularly helpful during the development of your target system boot code. The HP E3458A processor probe only accesses the debug pins of the target microcontroller and affects no other signals, for a more stable operation

Keysight-Agilent E3458A datasheet & specifications